I'm only beat by slow played AK or AQ. And these are hands that I guess Villain would have raised PF with from CO. Or maybe Villain has a full house with 22 or 66. But wouldn't it be smarter from him to slow play or value his raise instead of shoving? I thus saw the all-in as an attempt to bluff me out of the pot, Villain not believing that I have an A. Is my reasoning correct?

With the shove he often has a hand there but the question is what kind of hand, it could be easily a lot worse Ax there or something similar, maybe even just a PP. Also it's NL2 so I don't really find a fold there, I am going broke on turn.